After installing RT WebParts I tried to open the WebParts administration page but get an NullReferenceException error. The other pages from the pi data services admin can be open without a problem but the PI WebParts admin page cannot (see images below). Can anyone help me with this?
This looks like it could be a problem with the install. I would re-run the installer and select the 'Repair' option, and try agian. If the problem still persists, your best bet would be to contact the regular TechSupport at firstname.lastname@example.org. They can guide you through this - and even do remote support if needed.